This document summarizes key information about wireless communication technologies including Wireless Local Loop (WLL), Wireless Local Area Network (WLAN), and Bluetooth. WLL uses radio signals to connect subscribers to telephone networks as an alternative to copper wiring, reducing construction and operating costs. WLAN allows wireless connectivity between devices within a limited area like a home or office, providing installation flexibility and reduced costs compared to wired networks. Bluetooth operates in the unlicensed 2.4 GHz band using frequency-hopping spread spectrum, chopping up and transmitting data across multiple bands to enable short-range wireless communication between devices.

1. TOPIC - WLL,WLAN &
BLUETOOTH
Name- Marmik Kothari(140410111027)
Subject- Wireless Communication
Branch/Year : EC LY

2. Wireless Local Loop
 Sometimes called radio in the loop (RITL) or
fixed-radio access (FRA), WLL is a system that
connects subscribers to the public switched
telephone network (PSTN) using radio signals
as a substitute for copper for all or part of the
connection between the subscriber and the
switch. This includes cordless access systems,
proprietary fixed radio access, and fixed cellular
systems. . Using a wireless link shortens the
construction period and also reduces installation
and operating costs.

3. CATEGORIES OF
IMPLEMENTATION OF WLL
 Analog Cellular
 Digital Cellular
 Personal Communications Network (PCN)/Personal
Communications Service (PCS)
 Cordless Telephones 2nd generation (CT–2)/ Digital
European Cordless Telecommunication (DECT)
 Proprietary Implementations

4. ADVANTAGES OF WLL
TDM/TDMA and P-MP
communications equipment-
Communications equipment
based on time division
Multiplex/time division access
(TDM/TDMA) technology and a
point-to-multipoint (P-MP) system
is relatively well suited for rural
use, because it provides service
coverage over a wide area
encompassing the base station,
relay stations and subscriber
stations.

5. WLAN
WLAN stands for Wireless Local Area Network.
 Sometimes it is also called Local Area Wireless Network
(LAWN).
 Norman Abramson, a professor at the University of Hawaii,
developed the world’s first wireless computer
communication network, ALOHA net (operational in 1971).
 WLAN is a wireless computer network that links two or
more devices (using-spectrum or OFDM radio) within a
limited area such as a home, school, computer laboratory,
or office building.
 WLAN is a marketed under the Wi-Fi brand name.

6. ADVANTAGES OF WLAN
 Installation flexibility.
 Reduced cost-of-
ownership.
 Mobility

7. Installation speed and simplicity
• No cable to pull.
• Few transmitters/receivers for multiple for
users.
Reduced cost-of-ownership than computer• Mobile devices are less expensive
workstations.
• No need to build wiring closets.
Mobility
• Access to real-time information.
• Provides service opportunities.
• Promotes flexibility.
• Supports productivity.

8. TYPES OF WLAN
Infrastructure
Peer-to-peer
Bridge
Wireless distribution
system

9. • Bluetooth uses frequency-hopping spread
spectrum, which chops up the data being sent and
transmits chunks of it on up to 79 bands (1 MHz
each; centered from 2402 to 2480 MHz) in the range
2,400-2,483.5 MHz (allowing for guard bands).
• This range is in the globally unlicensed
Industrial, Scientific and Medical (ISM) 2.4 GHz short-
range radio frequency band.
• Bluetooth is a packet-based protocol with a master-
slave structure.

12. Thank You !